1. Third Order Linear Differential Equations;Greguš,1987
2. Topological Degree Methods in Nonlinear Boundary Value Problems;Mawhin,1979
3. Existence of solutions of a boundary value problem for third-order differential equation;Ponomarev,1994
4. The existence of a solution to a boundary value problem for third order differential equation with functional boundary conditions;Ponomarev,1995
5. Three methods for the study of semilinear equations at resonance;Przeradski;Coll. Math.,1993